ABAP Select data from SAP table CSTWHEREUSED into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CSTWHEREUSED table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to CSTWHEREUSED. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the CSTWHEREUSED table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_CSTWHEREUSED TYPE STANDARD TABLE OF CSTWHEREUSED,
      WA_CSTWHEREUSED TYPE CSTWHEREUSED,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <CSTWHEREUSED> TYPE CSTWHEREUSED.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CSTWHEREUSED.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CSTWHEREUSED
  INTO TABLE IT_CSTWHEREUSED.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CSTWHEREUSED
*  INTO TABLE @DATA(IT_CSTWHEREUSED2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_CSTWHEREUSED INDEX 1 INTO DATA(WA_CSTWHEREUSED2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CSTWHEREUSED ASSIGNING <CSTWHEREUSED>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CSTWHEREUSED>-MANDT = 1.
<CSTWHEREUSED>-MFGWORKINSTRUCTION = 1.
<CSTWHEREUSED>-MFGWORKINSTRUCTIONVERSCOUNTER = 1.
<CSTWHEREUSED>-MFGSTANDARDTEXT = 1.
<CSTWHEREUSED>-MFGSTANDARDTEXTVERSION = 1.

ENDLOOP.

LOOP AT IT_CSTWHEREUSED INTO WA_CSTWHEREUSED.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CSTWHEREUSED-LANGUAGE, sy-vline,
  WA_CSTWHEREUSED-BILLOFOPERATIONSGROUP, sy-vline,
  WA_CSTWHEREUSED-BOOOPINTERNALVERSIONCOUNTER, sy-vline,
  WA_CSTWHEREUSED-BILLOFOPERATIONSVARIANT, sy-vline,
  WA_CSTWHEREUSED-BILLOFOPERATIONSDISPLAYKEY, sy-vline,
  WA_CSTWHEREUSED-BOOVERSIONSTATUSTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CSTWHEREUSED you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_CSTWHEREUSED TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_CSTWHEREUSED INTO WA_CSTWHEREUSED.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ISOLA, internal->external for field LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_CSTWHEREUSED-LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CSTWHEREUSED-LANGUAGE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BILLOFOPERATIONSGROUP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CSTWHEREUSED-BILLOFOPERATIONSGROUP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CSTWHEREUSED-BILLOFOPERATIONSGROUP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BILLOFOPERATIONSVARIANT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CSTWHEREUSED-BILLOFOPERATIONSVARIANT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CSTWHEREUSED-BILLOFOPERATIONSVARIANT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OPERATION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CSTWHEREUSED-OPERATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CSTWHEREUSED-OPERATION.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OPACTYNTWKELEMENTEXTERNALID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CSTWHEREUSED-OPACTYNTWKELEMENTEXTERNALID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CSTWHEREUSED-OPACTYNTWKELEMENTEXTERNALID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BILLOFOPERATIONSVERSION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CSTWHEREUSED-BILLOFOPERATIONSVERSION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CSTWHEREUSED-BILLOFOPERATIONSVERSION.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_CSTWHEREUSED_STR, 
MANDT TYPE STRING,
MFGWORKINSTRUCTION TYPE STRING,
MFGWORKINSTRUCTIONVERSCOUNTER TYPE STRING,
MFGSTANDARDTEXT TYPE STRING,
MFGSTANDARDTEXTVERSION TYPE STRING,
LANGUAGE TYPE STRING,
BILLOFOPERATIONSGROUP TYPE STRING,
BOOOPINTERNALVERSIONCOUNTER TYPE STRING,
BILLOFOPERATIONSVARIANT TYPE STRING,
BILLOFOPERATIONSDISPLAYKEY TYPE STRING,
BOOVERSIONSTATUSTEXT TYPE STRING,
OPERATIONACTIVITY TYPE STRING,
OPERATIONTEXT TYPE STRING,
OPERATION TYPE STRING,
OPERATIONACTIVITYNAME TYPE STRING,
OPACTYNTWKELEMENTEXTERNALID TYPE STRING,
BILLOFOPERATIONSTYPE TYPE STRING,
BILLOFOPERATIONSVERSION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CSTWHEREUSED_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_CSTWHEREUSED_STR-MANDT sy-vline 
WA_CSTWHEREUSED_STR-MFGWORKINSTRUCTION sy-vline 
WA_CSTWHEREUSED_STR-MFGWORKINSTRUCTIONVERSCOUNTER sy-vline 
WA_CSTWHEREUSED_STR-MFGSTANDARDTEXT sy-vline 
WA_CSTWHEREUSED_STR-MFGSTANDARDTEXTVERSION sy-vline 
WA_CSTWHEREUSED_STR-LANGUAGE sy-vline 
WA_CSTWHEREUSED_STR-BILLOFOPERATIONSGROUP sy-vline 
WA_CSTWHEREUSED_STR-BOOOPINTERNALVERSIONCOUNTER sy-vline 
WA_CSTWHEREUSED_STR-BILLOFOPERATIONSVARIANT sy-vline 
WA_CSTWHEREUSED_STR-BILLOFOPERATIONSDISPLAYKEY sy-vline 
WA_CSTWHEREUSED_STR-BOOVERSIONSTATUSTEXT sy-vline 
WA_CSTWHEREUSED_STR-OPERATIONACTIVITY sy-vline 
WA_CSTWHEREUSED_STR-OPERATIONTEXT sy-vline 
WA_CSTWHEREUSED_STR-OPERATION sy-vline 
WA_CSTWHEREUSED_STR-OPERATIONACTIVITYNAME sy-vline 
WA_CSTWHEREUSED_STR-OPACTYNTWKELEMENTEXTERNALID sy-vline 
WA_CSTWHEREUSED_STR-BILLOFOPERATIONSTYPE sy-vline 
WA_CSTWHEREUSED_STR-BILLOFOPERATIONSVERSION sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.